package java201521123072;
import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNextInt()) {
        	 int a = in.nextInt();
        	if(a>10000&&a==10000&&a<20000&&a==20000){
        		 
        	}
        	else{
        		  System.out.println(a + b);
        	}
              
        }
    }
}